Yes i think its that or something similar after your suggestion. The conical bit slides closer or father with the bottom bar, and can be threaded up and down. This would hold arbors of various sizes, set vertically to match the diameter of the arbor. As the anvils are angled they would bend the...
Bought this second hand, but i dont know what it is. Does anyone know of these? Looks like a brake riveter but the anvils are angled, and it has a long sliding bar at the bottom with a conical bit?